/*
 * Copyright (c) 2024 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**---
 description: >
    TypeScript 5.0 manages to make all enums into union enums by creating a unique type for each computed member. 
 module: ES2022
 isCurrent: true
 ---*/


import { Assert } from '../../../suite/assert.js';

const enum Values {
  a = 3 / 2,
  b = 5 + 1,
  c = 1 * 3
}

type PrimaryValues = Values.a | Values.b;

function isPrimaryValues(c: Values): c is PrimaryValues {
  return c === Values.a || c === Values.b;
}

const firstValue = isPrimaryValues(Values.a);
Assert.isTrue(firstValue);

const secondValue = isPrimaryValues(Values.c);
Assert.isFalse(secondValue);